Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed5ac50e0176ca1…

MALICIOUS

PDF

89.5 KB Created: 2021-03-22 15:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c6b267c75ab46a47dab8c0d1c7285e30 SHA-1: b62d314d1ca7b20e71d3de5f4ff7e47910c24887 SHA-256: 0ed5ac50e0176ca188c7626510a5284a955c9b87787ee031f56585f0ac9a393d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/strik?utm_term=how+to+turn+on+blue+yeti+microphone PDF link annotation
    • http://bibopasaxuvibu.mypressonline.com/boy_scouts_of_the_philippines_handbook.pdfIn PDF document text
    • http://rajajime.mypressonline.com/71935351807.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/barcarole_in_der_nacht_noten.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/93725332391.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/uses_of_enchantment_bruno_bettelheim.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/quimica_organica_concepto_y_definicion.pdfIn PDF document text
    • http://bagezokazuraw.medianewsonline.com/garmin_740s_replacement_parts.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/39644123296.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/9437226768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_d7268243d3fe4287929fd3b8e3724899.pdf?index=trueIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_8dfe32d3adb84adba3f22fa64906e329.pdf?index=trueIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_89ff691055e24f2c87df8c6be708a320.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67494cd-1133-4f15-a75e-d5ecba406696/how_to_access_dvr_xfinity.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_501ca45c3d124ab0bebac93ddacefd96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aeaa9ff-0d50-4f86-af01-f3d0a9286c5c/can_you_replace_the_battery_in_a_citizen_eco_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03c5503-4f93-4a72-91d7-cdb91921b0b7/taco_bell_frito_burrito_nutrition_information.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/vaziposedokiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c78b26-bfe3-49a8-9dca-6e044f4f678e/49718899258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28477c8a-f1d3-4880-baf2-5d3a0eb11cc3/histria_do_brasil_nao_volume_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d737115-26b7-434a-b878-dfa6a61d98ba/lunemag.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_0b2618ae1827436986979eda65e976a2.pdf?index=trueIn PDF document text
    • http://tifavamifikas.myartsonline.com/mary_poppins_quotes_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97100ebc-2724-4a11-801c-9cb980e3f527/19231444210.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 5080 bytes
SHA-256: 05114e37cb7aac5f9d99598cef6cd0c275b4e542937324d37441055d4760dee8
font_01_sfnt_off00011d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D75 11200 bytes
SHA-256: 51aa37ff031eae3f80e387adb6e7cbf54af2b2606de8aa4beb6e5dfb6352371c
font_02_sfnt_off00014307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14307 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd